re PR tree-optimization/60002 (ICE: SIGSEGV in skip_artificial_parms_for() with…

re PR tree-optimization/60002 (ICE: SIGSEGV in skip_artificial_parms_for() with -O2 -fcompare-debug -fdeclone-ctor-dtor -fipa-cp-clone)

	PR tree-optimization/60002
	* cgraphclones.c (build_function_decl_skip_args): Clear
	DECL_LANG_SPECIFIC.

	* g++.dg/opt/pr60002.C: New test.

From-SVN: r207465

gcc/ChangeLog

 2014-02-04  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/60002
+	* cgraphclones.c (build_function_decl_skip_args): Clear
+	DECL_LANG_SPECIFIC.
+
 	PR tree-optimization/60023
 	* tree-if-conv.c (predicate_mem_writes): Pass true instead of
 	false to gsi_replace.

gcc/cgraphclones.c

@@ -390,6 +390,9 @@ build_function_decl_skip_args (tree orig_decl, bitmap args_to_skip,
       DECL_BUILT_IN_CLASS (new_decl) = NOT_BUILT_IN;
       DECL_FUNCTION_CODE (new_decl) = (enum built_in_function) 0;
     }
+  /* The FE might have information and assumptions about the other
+     arguments.  */
+  DECL_LANG_SPECIFIC (new_decl) = NULL;
   return new_decl;
 }
 

gcc/testsuite/ChangeLog

 2014-02-04  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/60002
+	* g++.dg/opt/pr60002.C: New test.
+
 	PR tree-optimization/60023
 	* g++.dg/vect/pr60023.cc: New test.
 

gcc/testsuite/g++.dg/opt/pr60002.C

+// PR tree-optimization/60002
+// { dg-do compile }
+// { dg-options "-O2 -fcompare-debug -fdeclone-ctor-dtor -fipa-cp-clone" }
+
+struct A {};
+
+struct B : virtual A { B (); ~B (); };
+
+B::~B ()
+{
+  B ();
+}